Hello Pete,Thanks I followed your advice and I did get in the BIOS boot menu and I see my SSD is now set as boot device, however whenever I start it still gives me the same error: "Default boot device missing or boot failed... "When I ok the error I get into a screen called 'boot manager' with a 'boot option menu' but that menu is empty. When I Esc out of that I get to a black screen with the error "No Bootable device..." . I did make a recovery USB from another Windows 8.1 desktop. When I boot using that stick and after having gone through selecting a keyboard I get 3 options on the first (PC Renewal) I get as fault that the disk is locked, I need to unlock and try again.Trying the 2nd option factory settings I get the fault that the disk is missing a partition.

What migration method did you use?Normally the OS will need to be reinstalled, but you can get around that using the following procedure:http://lifehacker.com/5837543/how-to-migrate-to-a-solid-state-drive-without-reinstalling-windows